data property

Map<String, String>? data
getter/setter pair

Input only.

Arbitrary key/value payload, which must be UTF-8 encoded. The key should not be a reserved word ("from", "message_type", or any word starting with "google" or "gcm"). When sending payloads containing only data fields to iOS devices, only normal priority ("apns-priority": "5") is allowed in [ApnsConfig](/docs/reference/fcm/rest/v1/projects.messages#apnsconfig).

Implementation

core.Map<core.String, core.String>? data;